Concrete-form.



S. R. McKAY.

CONCRETE FORM.

APPLICATION FILED JUNE 19, 1912.

1 ,2 1 2, 654:. Patented an. 16, 1917.

2 SHEETS$HEET l.

Zdifikessaa S. R. McKAY.

CONCRETE FORM.

APPLICATION FILED JUNE 19, 1912.

1,212,654. Patented Jan. 16,1917.

2 SHEETSSHEET 2.

ZQL' 62861998 STEWART. a. MOKAY, or PERTH AMBOY, NEW JERSEY, 'ASSI'GNOR '10 MOKAY, CONCRETE roam COMPANY, or sEwAnEN, NEW JERSEY, A CORPORATION or NEW J RSEY.

CONCRETE-FORM.

, Patented Jan. 16,1917.

Application filed June 19, 1912. Serial No. 704,472.

To all whomz't may concern:

Be it known that I, STEWART R. MoKAY, a citizen of the United States, residing at Perth Amboy, in the county of Middlesex and State of New Jersey, have invented certain new and useful Improvements in Concrete-Forms, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to frames or forms for setting walls or arches or other shapes of concrete or composition materials, in which forms the material, consisting of commingled cement, stone, etc., may be placed and allowed to harden.

The object'of the invention is to provide a frame or form which is possessed of-great flexibility, whereby it may be used, without material alteration or addition, for various jobs; to produce a frame or form which shall be capable of easy adjustment whereby a wall may be built in successive courses without disassembling or removing the frame; to provide aframe or form comprising an adjustable plate or board wherein the plate or board may be conveniently removed after the completion of one course and adjusted to another position with a minimmn of labor and inconvenience.

A further object of the invention is to provide a construction of frame whereby the convenience and efiiciency of the molding operation may be increased and to embody these results-in a form or frame which is particularly economical of production.

The invention may further and more generally be 'stated as consisting in the construction, arrangement and combinations of the various parts as described hereinafter and embodied in the claims hereto annexed.

In the accompanyiny drawings illustrating my invention; Figure 1 is a perspective view of my improved concrete form, the same being of the special construction adapted for walls. Fig. 2 is an enlarged, detail, side view of the means for locking the removable plate or board in position. Fig. 3 is an enlarged horizontal'section. Fig. 4 is a perspective view ofa form of the invention intended more particularly for use in the building of concrete arches.

Similar characters of reference designate corresponding parts' throughout the -dif-- ferent figures of the drawing.

In the embodiment of myinvention illustrated herein the form or frame comprises a' suitable number of posts, and plates or boards insertible between and longitudinally adjustable with respect to said posts, with means for clamping the boards or plates to the posts in various positions along the latter. In one form of my invention (Figs. 1 to 3 inclusive) I have shown the posts as comprising each a plurality of hollow telescoping metal sections, the metal sections being shown as stiffened "and supported by means of wooden beams 2, it being understood that these beams are not .absolutely essential and can be dispensed with (see Fig. 4). The beams are shown as inclosed by the hollow metal sections 1,

which are sufiiciently stiff and firm to constitute the posts in many instances without the employment of the woodenbeams.

The metallic sections 1 are placed 'in position with respect to the work to be per-' formed, so that two or more 'of them may be located on one side of the work, as shown in Fig. 1, and two or more on the opposite side and between them the concrete filling 5 is placed. The metallic sections 1 and their inclosed beams 2 are customarily connected to the similar members on the other side of the concrete filling by means of cross-bolts 6, which serve to keep the parts in place. Furthermore, the posts on the same side of the concrete are connected together by an adjustable plate or board 4 of suitable width v and length, which is capable of being removed and placed in new positions successively as the building of the wall 5 pro grosses upwardly. By referring to Fig. 3, as also to Fig. 1, it will be noted that the vertical edges ofthe board or plate 4 are beveled to correspond to the bevel or inclination of theadjacent sides of the uprights 1, so that there may be a tight fit between the board and the uprights, the inclination of these beveled edges being such that the board can be withdrawn away from the concrete filling, but when pushed inwardly into position will not be thrust too far in, but will come substantially flush with the faces of the uprights 1, as shown in Fig.1. While the plate 4 is in one position, a concrete mixture is filled in against it and allowed to standand harden for the proper time, several days say, and when so hardened the plate or board 4 is removed and lifted into a new position so that the wall may be built still higher. The

Q I i 1,212,654

board or plate is held in place in the positions to which it may be adjusted by means ofsuitable clamps or engaging devices, which I shall presently explain. It should first be noted, however, that in using the uprights 1 and connecting boards 4 I am not restricted to the use of them on both sides of the concrete, but can employ them only on one side when there is some other backing for the filling to rest against on the opposite side. I wish it to be understood that I am claiming broadly the verticallyadjustable connecting plate 4 between suitable uprights to which it is attached by latching or engaging means for the purpose expressed.

The angular, hollow, metal post sections 1 are shaped in general with a T-form and provided on the sides with dove-tailed grooves 7 which extend vertically from top to bottom. These grooves are for the purpose of receiving the expanding fingers 8, 8, of the fastening device. This device is shown in detail in Fig. 3 and in side view in Fig. 2. It consists essentially of a plate 15 screwed to the board 4 and having a horizontal slot 14. The two fingers 8 are pivoted together at 9 and one of them is formed integral with a plate 19 pivoted at 20 to the plate 15 and susceptible of a movement in a vertical plane during the process of ad-' justing it, as indicated in Fig. 2. A knob 10 having a shank 11, carrying a bar 13 at the end thereof is supported in the extension 21 of the other finger 8 and also in the plate 19 and, as shown in Figs. 2 and 3, the bar 13 passesthrough theslot 14 in the plate 15, after which it can be turned by the knob 10 and placed crosswise of the slot. It is easily released from the plate 15 by turning it and drawing it through the slot 14. Between the plate 19 and the extension 21 of one of the fingers 8, a sprin will be seen that this fastening device is readily operated by. means of the knob 10 by which it can be moved upon its pivot 20 and the fingers 8, 8 caused to enter the dovetailed slot 7, it being observed that the ends of these fingers are inclined or flared outwardly from each other. The operator can then by pressing the knob 10 against the extension 21, cause the bar 13 to pass through I the slot 14 and then by turning the knob 10 can lock the bar 13 on the inside of the plate 15, during which operation the spring 12 will be compressed and movable fingers 8 will be expanded within the slot 7 so that the two fingers 8 will tightly grip the opposite sides of said slot. When the parts are to be disengaged the user will turn the knob 10 and disengage the knob 10 when the spring 12 will immediately perform its function of throwing the extension 21 away from the plate 19 and thus disengage the fingers 12 which sur-. rounds the shank 11 is tensloned. Thus it 8 from 'slot 7. There is one of these fasten-- ing devices at each corner of the plate 4 and when they'are all securely fastened to the dovetail grooves in'the posts it will be readily understood that the board will be securely locked until these fastening agencies are released, and while the board is thus securely locked it will serve as a rigid side of the form against which the concrete mixture is being placed.

The metallic sections 1 areprovided with interior, telescoping, similarly shaped metallic sections 3 which fit neatly inside of the hollow sections 1 and are withdrawable therefrom so as to easily extend the length of the posts the requisite amount as may be desired. These extension telescopic parts are clearly seen in Figs. 1 and 3 in their position inside of the receiving, hollow post sections, and in Fig. 4 where the form of the fastenin devices .in like manner as the grooves of the post sections land 3 receive them.

In the form of the invention illustrated in Fig. 4, which is intended for arch construction, the size of the connecting plate or board 18 is the same as the size of the plate or board 4 in the other figures of the drawing, and the whole operation is virtually the same except that the plates or boards are in a horizontal instead of a vertical position. It .will be noted that the main members 16 and also the telescoping extension members 17 are provided with openings or perforations 22 for the passage of bolts or pins; also in Fig. 1 it will be seen that at 23 I employ pins or bolts forsecuring the hollow metallic sections'1 to the wooden beams 2 and also on the sides of the metallic sections 1 are sometimes employed bolts 24. Obviously bolts or fastening pins can be used at any point in the combination of all the parts wherever they may be found necessary in order to hold the parts properly together.

The member 4 has been referred to hereinbefore as a plate or a board For the purpose of avoiding any seeming alternativeness in the claims, the term plate will be employed therein as referring to the said element, it being understood that I do not thereby preclude myself from the use of wood or any other material that may be de sirable or necessary to use in the construction of such element. In both forms of my invention illustrated herein, it will be seen that the hollow posts are provided with surfaces or faces which are presented toward the material to be molded. For convemence of description, the'sefaces will be referred to as the inner faces, since theyare presented toward this material while-the opposite portions offaces are exposed, permitting convenient access thereto by-theoperator. Furthermore, it will be observed that the lateral sides or faces of the posts are provided each with seats or seating surfaces which cooperate with the ends of the interposed plate in such manner as to provide an increasing clearance between such. seats and such plate ends as the plates are moved outskilled in'the art, and, it will be found in practice to be of great value because of its novelty and ingenious adaptation to the economical working out of the problems involved in the formation of concrete walls and arches.

Having thus described my invention, what I adjustable plate whose edges are beveled to correspond with the bevel of the said flanges, and whose positioncan be changed along the length of the said beams, and fastening means on said plate for engaging the dovetailed grooves in the beams, said fastening means consisting of pivoted fingersengaging the grooves and. a spring-provided knob carrying also a bar and arranged to hold the pivoted fingers closely in engagement with the beams.

2. The combination with hollow metal members having dovetailed, longitudinal, lateral flanges, of an adjustable plate, and fastening means thereon consisting of movable-fingers engaging the grooves, said fingers being pivoted together, a plate to which one of the fingers is pivoted, and a springprovided knob having a bar at one end thereof for assisting in locking the fingers in engagement with the dovetailed grooves. 3. The combination with main members having grooves, of an adjustable plate, and fastening means thereon engaging the main members and composed of interpivoted parts whichex'pand in the mainmembers, and a spring-provided knob having a bar engaging a-slotted plate and operated to control the action of the expanding fingers.

4. In a form of the character described, the combination of a pair of posts each-con-. sisting of a plurality of telescoping sections and each post having an'inner' face presented toward the material to be molded and a lateral seat, a plate interposed between said posts and adjustable longitudinally of said seats, and 'means for clamping said plate to said posts with its inner face in substantially the plane of the inner faces of the posts, the seats and the ends of the plate cooperating to provide an increasing clearance between the ends of the plate and the seats as the plate is moved outwardly with respect to the seats.

5. Ina form of the character described, the combination of a pair of posts, a plate adapted to be inserted between said posts, said posts and said plate having cooperating beveled surfaces providing an increasing clearance between the ends of the plate and the posts as the plate is moved outwardly,

and clamping devices for securing the plate to the posts.

6. In a form of the character described, I

the combination of a pair of posts, a plate adapted to beinserte between said posts with its ends in engagement with said posts, the sides of the posts and the ends of the plate being provided with cooperating bev:

eled surfaces providing an .increasing clearance between the ends of the plate and the sides of the posts as the plate is moved outwardly, and means cooperating with each post and the adjacent part of the plate whereby the plate may be secured to the posts in positions varying longitudinally with respect to the posts. i

7." In a form of the character described,

, the combination of a pair of posts, a plate adapted to be inserted between and to seat against said posts, and means for securing the plate to the posts in positions varying longitudinally with respect to the posts with the inner face of the plate and the inner faces of the posts in substantially the-same plane, the ends of the plate and the sides of the posts being provided with cooperating surfaces providing an increasing clearance between such ends and the posts as the plates are moved outwardly with respect to their seats against the posts.

8. In aform of the character described, the combination of a pair of posts each having a lateral seat, the seats facing each other, a plate adapted to be inserted between the posts with its ends in engagement with said seats and tobe adjusted longitudinally of said seats, the seats and theends of the plate cooperating to provide an increasing clearance between the ends-of the plate and g gamma the seats as the plate is moved outwardly with respect to the seats, and means for clamping the plate in various adjusted positions along s'ald seats.

' 9. In a form of the character described, the combination of a pair of posts each having a lateral seat, the seats facing each other, a plate adapted to be inserted between the posts with its ends in engagement with said seats and to be adjusted longitudinally of said seats, the seats and the ends of the plate cooperating to provide an in creasing clearance between the ends of the plate and the seats as the plate is moved outwardly with respect to the seats, and means cooperating with each post and the portion of tl-; plate adjacent thereto for securing the plate in various positions along said seats.

10. In a form of the character described, the combination of a pair of posts, each post comprising a plurality of telescoping sections. each section having a lateral seating surface, the seating surfaces of the sections cooperating to form a longitudinally continuous surface throughout the length of the posts when the posts are extended, the seating surface on one post being opposite the seating surface on the other post, a plate adapted to be interposed between the posts with its ends in engagement with the seats thereof and means whereby the plate may be secured to the posts in various positions along the seats.

11. In a form of the character described, the combination of a pair of posts, each post comprising a plurality of telescoping sections, each section having a lateral beveled seating surface, the seating surfaces of the sections cooperating to form a longitudinally continuous seating surface throughout the length of each post when the posts are extended, the seating surface on one post being opposite the seating surface on the other post, a plate adapted to be interposed between the posts with its ends in engagement with the seats thereof and means whereby the plate may be secured to the posts in various positions along the seats.

12. In a form of the character described, the combination of a pair of posts,a plate adapted to be inserted between said posts, and means for securing the plate to the posts in various adjusted positions, said means comprising a clamping member carried by each of the posts and a clam ing device at each end of the plate, each of said clamping devices comprising a pair of members adapted to engage the first mentioned member, yielding means for holding the last mentioned members in contact with the first mentioned member, and an operating device for releasing the last mentioned members against the action ofthe said yielding means.

13. In a form of the character described, the combination of a pair of posts, a plate adapted to be inserted between said posts and to beadjusted therealong,-and means for securing the plate to the posts in various adjusted positions, said means comprising a pair of clamping members adjacent each end of the plate, a cooperating member ex tending longitudinally of each of the posts and adapted to be engaged by the adjacent clamping members, means for automatically spreading and holding the clamping mem bers in engagement with the corresponding member on each post, and means whereby the clamping members may be released from gn'gagement with the cooperating post memers.

In testimony whereof I affix my signature in the presence of two witnesses.

STEWART R. McKAY.

Witnesses:

JEANNETTE STORK, I L. S. PERRINE. 

